Don't Underload, Please!
Just a couple thoughts here - I don't know how much experience you have with loading, so forgive me if this is too basic.
Please don't go under the recommended loads published in reputable load manuals. You do need enough powder for reliable ignition - underloaded rounds can be as dangerous as a double charge
If your load is too light, be aware that if you encounter a squib round, you won't be getting as much feedback (recoil) from the other range loads, and you certainly don't want to chase a slug stuck in your barrel with another bullet by mistake
Also, really light range loads don't always have enough powder to expand the casing and get a good seal, so you wind up with really dirty looking brass (smoked looking half the way down the case or more) and you wind up generating a lot more crud than if you used a little more powder.
I certainly understand wanting to get a lot of trigger time and not spending a lot, but just a little more powder won't break the bank and may be, in the long run, a better choice than just a little less powder. The 3.1 grain suggestion may be a pretty good place to start - you can always work up or down to get to a sweet spot.
Make very sure that you pay attention when loading low power loads with powder like Bullseye - it's way too easy to double charge by mistake. If you load a lot, the laws of probability may just "bite you in the bum" one day. Been there, done that
If you choose to go to a high volume powder like Trail Boss, no problem with a double charge - it will spill out the case. I'm not saying you should switch powders, just want to make sure you understand the cautions.
Happy shooting!